package com.easy.util;

import cn.hutool.crypto.digest.DigestUtil;

public class PasswordUtil {
    private final static char[] arr={'a','b','c','d','e','f', '0','1','2','3','4','5','6','7','8','9'};
   private final static int salt_index=5;
   private final static int count_index=15;
    public static String getEncryption(String password){
        //随机盐值
        int index_salt=(int)(Math.random()*arr.length);
        char salt=arr[index_salt];
        //随机加密次数
        int index_count=(int)(Math.random()*arr.length);
        char count=arr[index_count];
        String encryptionPassword=password+salt;
        for (int i=0;i<count;i++){
            encryptionPassword=DigestUtil.md5Hex(encryptionPassword);
        }
        StringBuilder strb=new StringBuilder(encryptionPassword);
        strb.insert(salt_index,salt);
        strb.insert(count_index,count);
        return strb.toString();
    }

    public static boolean checkPassword(String password,String encryptionPassword){
        //获取盐值
        char salt=encryptionPassword.charAt(salt_index);
        //获取加密次数
        char count=encryptionPassword.charAt(count_index);
        String decode=password+salt;
        for (int i=0;i<count;i++){
            decode=DigestUtil.md5Hex(decode);
        }
        StringBuilder strb=new StringBuilder(decode);
        strb.insert(salt_index,salt);
        strb.insert(count_index,count);
        return strb.toString().equals(encryptionPassword);
    }

    public static void main(String[] args) {
     /* System.out.println(getEncryption("123123"));*/
        System.out.println(checkPassword("123123","c066e7e2c84b038dc92ae24220373e7b67"));
    }
}

